Ventilating system



May 28, 1929. w KE|SER VENTILATING SYSTEM Fil ed March 14, 1925 WALTER-KEISER,

I Patented May 28, 1929.

UNITED smrlzs .PATENTYOFNFICE.

WALTER KEISER, OF ST. LOUIS, MISSOURI, ASSIGNOR TO THE AIR CONDITIONINGAND ENGINEERING 00., OFLST. LOUIS, MISSOURI, A. CORPORATION.

VENTIIiATINg' SYSTEM.

Applicationfiled March 14,1925. Serial No. 15,560.

2 My invention relates to improvements in ventilating systems. and moreparticularly to those which are arranged to recirculate air and adaptedto employ an air purifying agent. j

It is well known that when air is drawn from occupied areas andrecirculated that the odors and other deleterious matters which arepresent are not only obnoxious, but also .10 harmful, and that, inpresent ventilatingpractice, it is common to use ozone as the agent withwhich to make this recirculated A further object is to provide 'a meanswhere-' by the ozone generator is' not dependenton any human agencytoput it in operation, but may be automatically started and put inoperation by the flow or pressure of recirculated air in the system.

My improvements consist in the novel construction, combination, andarrangement of arts hereinafter fully, clearly, and concisely described,definitely pointed out in my claims and illustrated by the accompanyingdrawing which is a diagrammatical illustration of a portion of a buddingequipped with a typical recirculating system.

For-the purpose 'of illustrating my invention, I have' shown. in theaccompanying .drawin one form thereof which is at present p're erred by'me,ince the same has been found in practice to give satisfactory andreliable results, although it is to be understood that the variousinstrumentalities of which myinvention consists can be variouslyarranged and oragnized and that my invention is'not limited to theprecise arrangement and organization of these instrumentalities r asherein shown and described.

1 is a ventilating fan whichimay be driven by a motor 2 which has anyusual starting and stopping means such as the switch 2 connected to thewires, 2". 3 is'an ozone generator. The. fan and generator are referablyin a chamber such as A, whic -may the ozone generator.

have a heater 4, preferably .positioned in one wall, through which air.is admitted for introduction into the system-and building. 5 is a ductwhich conveys air-from the fan into a room of the building, such as B,through suitable ducts and openings such as 6 and 7, respectively. 8 isa vent opening through which air is exhausted from the room B throughthe ducts 9 and 10. These ducts communicate with a return duct or .ventshaft 11 through the opening 12. Communication to the return duct may becut ofl, when desider, by a suitably located damper 13. By preference, Ialso provide a ventilator 14 equipped with a damper 15, located at somesuitable portion of the buildingi throughwhich airmay"be expelled fromthe building. 16 is an opening for admitting outside air and may beequipped with adjustable dampers 17. 18 is anair operated switch of'ai ysuitable design, This switch, which has a balanced air vane 19, isplaced in an easily accessible place in any of the ducts orair passagesthrough which recirculated air flows and is actuated or operated by theforce or pressure of the moving air against the vane. The movement ofthis vane opens or closes the electric circuit between the-switch and Inthis connection I do not wish to be understood as limiting myself to theprecise form of switch shown or described, as it is obvious that I mayemploy any form ortype of air-actuated switch which is adapted torespond to the flow of ail-ordinarily set up in the ducts orpassages ofa ventilating system. 20 and 21 are wires supplying electric current tothe switch and the ozone generator. I W

- The operation of my invention lows: a When it is desired torecirculate the air in is as folthe building, the damper 15. in theventilator 14 is closed, thus preventing the expulsion of the air to theatmosphere. In this case the damper 13 isopened so that the air can bedrawn from the duct 10 into the return duct 11 and thus recirculated.The damper 17 I may be closed entirely for. complete-recirculation orpartly opened for partial recirculation. The motor 2 causes the fan -1to operate,

resulting in a circulation of air through ducts, 5, 6, 9, 10 and .11,chamber A and room the ozone generator. The air drawn through the duct11, together with such air as may be admitted through the outsideopening 16, passes through the heating coils 4 and into chamber A whereozone is being produced in suitable quantities for purificationpurposes. The purified air then pass s through the fan 1 and into duct5, where it is'carried through the system, being discharged into a roomor rooms B, in its course of recirculation. When the fan is stopped,movement of air through the duct 11 ceases,-thereby releasing thepressure or force against the vane and allowing it to return to closedposition; this breaks the supply circuit to the ozone generator and thusshuts it ofi. Y

I claim; g

1. A ventilating system having an ozone generator and means adapted toemploy moving air to put the ozone generator into operation and stop theozone generator when air movement ceases.

2 In a ventilating system adapted to recirculate air, means forelectrically treating air, and means adapted to employ moving air tobring said air-treating means into operation only while recirculation isin progress.

3. In a ventilating system a fan, air passages, means for electricallytreating air, and means adapted to be actuated by the movement of air tosecure operation of the air treating means. 1

4. In a recirculating ventilating system a fan, air passages, an ozonegenerator, and means adapted to be actuate" by the movement of air tosecure automatic operation of the ozone generator only when air, isrecirculated through the system.

5., In a recirculating ventilating system adaptedto. employ ozone, airactuated means adapated ,to control the introduction of ozone into thesystem only when recirculation occurs. H I

6,. A recirculating ventilating system comprising means adapted'togenerate and introduce ozone, means adapted to recirculate air,

and means whereby recirculated air causes 9. In a recirculatingventilating system,-

ducts, means for producing a flow of air through. said ducts, an ozonegenerator having an electric supply circuit connected therewith andmeans .for causing the said flow of air to close the electric supplycircuit to said ozone generator.

10. A recirculating ventilating system comprising a fan, ducts, anelectric switch, an ozone generator, and means whereby the re circulatedair'is employed to actuate the switch and supply electric current tosaid ozone generator while the recirculated air moves through said ductsand cut off said electric current when the movement of said air ceases.

11. A recirculating ventilating system comprising the combination of afan, air

passages, an ozone generator, means for restricting and directing theflow of air through saidpassages, means for admitting outside air, meansfor exhausting air to the atmosphere, an electric switch connected withthe ozone generator and means connected with said switch whereby saidswitch is actuated by the force of the air moving through an airpassage.

WALTER KEISER.

